docs: fix links in Markdown files (#219)

README.md

@@ -126,11 +126,11 @@ See the list of features that are still missing in the component:
 - [ ] generated code for protocol `amqp` could be out of date. Please have a look to [application.yaml](template/src/main/resources/application.yml) and [AmqpConfig.java](partials/AmqpConfig.java) 
 - [ ] tests for protocol `amqp` are not provided
 - [x] add annotation to the [model generation](template/src/main/java/com/asyncapi/model). Consider "@Valid", "@JsonProperty", "@Size", "@NotNull" e.t.c.
-- [ ] [`parameters`](https://github.com/asyncapi/asyncapi/blob/master/versions/2.0.0/asyncapi.md#parametersObject) for topics are not supported
-- [ ] [`server variables`](https://github.com/asyncapi/asyncapi/blob/master/versions/2.0.0/asyncapi.md#serverVariableObject) are not entirely supported 
-- [ ] [`security schemas`](https://github.com/asyncapi/asyncapi/blob/master/versions/2.0.0/asyncapi.md#securitySchemeObject) are not supported
-- [ ] [`traits`](https://github.com/asyncapi/asyncapi/blob/master/versions/2.0.0/asyncapi.md#operationTraitObject) are not supported
-- [ ] Json serializer/deserializer is used always, without taking into account real [`content type`](https://github.com/asyncapi/asyncapi/blob/master/versions/2.0.0/asyncapi.md#default-content-type)
+- [ ] [`parameters`](https://github.com/asyncapi/spec/blob/2.0.0/versions/2.0.0/asyncapi.md#parametersObject) for topics are not supported
+- [ ] [`server variables`](https://github.com/asyncapi/spec/blob/2.0.0/versions/2.0.0/asyncapi.md#serverVariableObject) are not entirely supported 
+- [ ] [`security schemas`](https://github.com/asyncapi/spec/blob/2.0.0/versions/2.0.0/asyncapi.md#securitySchemeObject) are not supported
+- [ ] [`traits`](https://github.com/asyncapi/spec/blob/2.0.0/versions/2.0.0/asyncapi.md#operationTraitObject) are not supported
+- [ ] Json serializer/deserializer is used always, without taking into account real [`content type`](https://github.com/asyncapi/spec/blob/2.0.0/versions/2.0.0/asyncapi.md#default-content-type)
 - [x] client side generation mode (in general just flip subscribe and publish channels)
 - [ ] template generation of docker-compose depending on protocol of server, now the rabbitmq is hardcoded